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单词 mid-feather
释义

mid-feathern.

Brit. /ˈmɪdˌfɛðə/, U.S. /ˈmɪdˌfɛðər/
Origin: Formed within English, by compounding. Etymons: mid adj., feather n.
Etymology: < mid adj. + feather n. (compare feather n. 15).Recorded in Eng. Dial. Dict. s.v. mid adj. and n. from Cheshire in senses ‘a narrow ridge of land between two pits’, ‘the plates running between the fire and parallel to the sides of the pan in salt-making’, and from Yorkshire in senses ‘the principal timber at the bottom of the cart’, ‘the posts against which folding-doors are shut’.
1. A thin structure dividing or partitioning the interior of a furnace, flue, etc. (see quots.). Also (Joinery): = cross-tongue n.
ΘΚΠ
society > occupation and work > equipment > furnace or kiln > furnace > parts of furnace > [noun] > other parts of furnaces
sump1673
stoking-hole1683
stoking-place1744
mid-feather1748
bottoming hole1815
trunnel-head1819
keystone1821
vault1825
well1825
nose-hole1832
fore-stone1839
nose1839
tongs-carriage1839
tunnel-head1843
glory-hole1849
1748 W. Brownrigg Art of making Common Salt ii. ii. 51 The body of the furnace consists of two chambers divided from each other by a brick partition called the mid-feather.
1797 Encycl. Brit. XVI. 626/1 The body of the furnace consists of two chambers, divided from each other by a brick partition called the mid-feather.
1875 E. H. Knight Amer. Mech. Dict. II. 1437/2 Mid-feather, a water-bridge in a steam-boiler furnace which occupies a middle position in the flue-space, the flame passing both above and below it.
?1905 G. F. Goodchild & C. F. Tweney Technol. & Sci. Dict. 402/1 Midfeather (Paper Manufac.), a partition fixed in the ‘breaker’ to promote circulation of the pulp.
1930 Engineering 22 Aug. 223/1 Numerous tests showed that, provided the midfeather was inserted at the fan end of the duct, completely uniform distribution of the dust was obtained.
1940 Chambers's Techn. Dict. 547/1 Mid-feather (Join.), a cross-tongue.
1974 P. Wright Lang. Brit. Industry xv. 150 The mid-feather is the brickwork dividing between the two flues.
2. Mining. A support for the centre of a tunnel. Obsolete. rare.Apparently only attested in dictionaries or glossaries.
ΚΠ
1898 Webster's Internat. Dict. Eng. Lang. Midfeather,..2. (Mining) A support for the center of a tunnel.
This entry has been updated (OED Third Edition, March 2002; most recently modified version published online March 2022).
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n.1748
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